Load station metadata

Organize speed data

Convert station level data to route level data

# 09/12/2004 - 09/11/2014 analysis

Plot speed data

Base DID models

Using I-84 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-84 as the experimental corridor
## ==========================================================================================================
##                                                            Dependent variable:                            
##                                ---------------------------------------------------------------------------
##                                                               Travel Speed                                
##                                    AM Inbound         PM Inbound        AM Outbound        PM Outbound    
##                                       (1)                (2)                (3)                (4)        
## ----------------------------------------------------------------------------------------------------------
## Time Period (after = 1)             5.690***           7.130***           5.050***           1.350***     
##                                     (0.498)            (0.584)            (0.505)            (0.433)      
##                                                                                                           
## Group (experimental group = 1)       0.247             9.770***          -5.310***          -14.800***    
##                                     (0.519)            (0.603)            (0.519)            (0.441)      
##                                                                                                           
## Time Period × Group                  -0.158             -0.157            2.790***           4.090***     
##                                     (0.696)            (0.809)            (0.719)            (0.614)      
##                                                                                                           
## Constant                           35.200***          34.600***          51.400***          46.100***     
##                                     (0.379)            (0.444)            (0.374)            (0.319)      
##                                                                                                           
## ----------------------------------------------------------------------------------------------------------
## Observations                         4,414              4,429              4,454              4,518       
## R2                                   0.056              0.160              0.096              0.300       
## Adjusted R2                          0.055              0.160              0.095              0.300       
## Residual Std. Error            11.500 (df = 4410) 13.400 (df = 4425) 12.000 (df = 4450) 10.300 (df = 4514)
## ==========================================================================================================
## Note:                                                                          *p<0.1; **p<0.05; ***p<0.01

Using I-205 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-205 as the experimental corridor
## =======================================================================================================
##                                                          Dependent variable:                           
##                                ------------------------------------------------------------------------
##                                                              Travel Speed                              
##                                   AM Inbound         PM Inbound        AM Outbound       PM Outbound   
##                                       (1)               (2)                (3)               (4)       
## -------------------------------------------------------------------------------------------------------
## Time Period (after = 1)            5.690***           7.130***          5.050***          1.350***     
##                                     (0.381)           (0.463)            (0.134)           (0.265)     
##                                                                                                        
## Group (experimental group = 1)     18.900***         16.400***          7.580***          8.350***     
##                                     (0.407)           (0.490)            (0.142)           (0.280)     
##                                                                                                        
## Time Period × Group                -4.390***         -6.100***          -2.180***         -1.270***    
##                                     (0.547)           (0.658)            (0.192)           (0.380)     
##                                                                                                        
## Constant                           35.200***         34.600***          51.400***         46.100***    
##                                     (0.290)           (0.352)            (0.100)           (0.195)     
##                                                                                                        
## -------------------------------------------------------------------------------------------------------
## Observations                         4,173             4,214              4,426             4,459      
## R2                                   0.479             0.297              0.587             0.272      
## Adjusted R2                          0.479             0.296              0.586             0.272      
## Residual Std. Error            8.770 (df = 4169) 10.600 (df = 4210) 3.180 (df = 4422) 6.310 (df = 4455)
## =======================================================================================================
## Note:                                                                       *p<0.1; **p<0.05; ***p<0.01

Multiple time periods DID models

Using I-84 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-84 as the experimental corridor
## ===============================================================================================
##                                                 Dependent variable:                            
##                     ---------------------------------------------------------------------------
##                                                    Travel Speed                                
##                         AM Inbound         PM Inbound        AM Outbound        PM Outbound    
##                            (1)                (2)                (3)                (4)        
## -----------------------------------------------------------------------------------------------
## Group                     0.247             9.770***          -5.310***          -14.800***    
##                          (0.500)            (0.571)            (0.506)            (0.436)      
##                                                                                                
## year_1st                 9.050***           9.650***           5.520***           1.540**      
##                          (0.779)            (0.894)            (0.816)            (0.711)      
##                                                                                                
## year_2nd                 5.050***           9.910***           5.320***           3.980***     
##                          (0.778)            (0.900)            (0.815)            (0.728)      
##                                                                                                
## year_3rd                 4.830***           5.400***           4.920***            0.519       
##                          (0.778)            (0.890)            (0.817)            (0.704)      
##                                                                                                
## year_4th                 5.670***           6.560***           5.010***            -0.050      
##                          (0.786)            (0.915)            (0.829)            (0.716)      
##                                                                                                
## year_5th                 3.660***           3.830***           4.430***            0.868       
##                          (0.814)            (0.934)            (0.857)            (0.738)      
##                                                                                                
## Group:year_1st          -14.200***         -18.200***          7.290***           7.880***     
##                          (1.110)            (1.270)            (1.340)            (1.170)      
##                                                                                                
## Group:year_2nd           5.470***            2.150*             0.621              0.469       
##                          (1.100)            (1.260)            (1.150)            (1.020)      
##                                                                                                
## Group:year_3rd           5.190***           7.820***            -1.350            1.990**      
##                          (1.100)            (1.250)            (1.150)            (0.995)      
##                                                                                                
## Group:year_4th            -0.379             1.240             -2.650**           3.450***     
##                          (1.160)            (1.330)            (1.220)            (1.060)      
##                                                                                                
## Group:year_5th           2.670**            5.660***          11.800***           8.080***     
##                          (1.130)            (1.290)            (1.200)            (1.030)      
##                                                                                                
## Constant                35.200***          34.600***          51.400***          46.100***     
##                          (0.365)            (0.420)            (0.365)            (0.316)      
##                                                                                                
## -----------------------------------------------------------------------------------------------
## Observations              4,414              4,429              4,454              4,518       
## R2                        0.125              0.249              0.141              0.316       
## Adjusted R2               0.123              0.247              0.139              0.314       
## Residual Std. Error 11.100 (df = 4402) 12.700 (df = 4417) 11.700 (df = 4442) 10.200 (df = 4506)
## ===============================================================================================
## Note:                                                               *p<0.1; **p<0.05; ***p<0.01

Using I-205 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-205 as the experimental corridor
## =======================================================================================================
##                                                          Dependent variable:                           
##                                ------------------------------------------------------------------------
##                                                              Travel Speed                              
##                                   AM Inbound         PM Inbound        AM Outbound       PM Outbound   
##                                       (1)               (2)                (3)               (4)       
## -------------------------------------------------------------------------------------------------------
## Time Period (after = 1)            18.900***         16.400***          7.580***          8.350***     
##                                     (0.403)           (0.485)            (0.139)           (0.277)     
##                                                                                                        
## Group (experimental group = 1)     9.050***           9.650***          5.520***          1.540***     
##                                     (0.612)           (0.742)            (0.217)           (0.434)     
##                                                                                                        
## Time Period × Group                5.050***           9.910***          5.320***          3.980***     
##                                     (0.611)           (0.747)            (0.217)           (0.445)     
##                                                                                                        
## year_3rd                           4.830***           5.400***          4.920***            0.519      
##                                     (0.611)           (0.739)            (0.218)           (0.430)     
##                                                                                                        
## year_4th                           5.670***           6.560***          5.010***           -0.050      
##                                     (0.617)           (0.760)            (0.221)           (0.438)     
##                                                                                                        
## year_5th                           3.660***           3.830***          4.430***           0.868*      
##                                     (0.639)           (0.775)            (0.228)           (0.451)     
##                                                                                                        
## Group:year_1st                     -6.030***         -7.690***          -4.260***          -1.160*     
##                                     (0.866)           (1.050)            (0.310)           (0.615)     
##                                                                                                        
## Group:year_2nd                     -3.350***         -7.330***          -3.490***         -4.040***    
##                                     (0.864)           (1.050)            (0.308)           (0.623)     
##                                                                                                        
## Group:year_3rd                     -2.630***         -3.760***           -0.096           1.970***     
##                                     (0.869)           (1.050)            (0.314)           (0.622)     
##                                                                                                        
## Group:year_4th                     -6.350***         -7.620***          -1.580***          -0.279      
##                                     (0.897)           (1.070)            (0.318)           (0.635)     
##                                                                                                        
## Group:year_5th                     -6.700***         -5.770***          -1.170***         -3.270***    
##                                     (1.210)           (1.380)            (0.329)           (0.651)     
##                                                                                                        
## Constant                           35.200***         34.600***          51.400***         46.100***    
##                                     (0.286)           (0.349)            (0.097)           (0.193)     
##                                                                                                        
## -------------------------------------------------------------------------------------------------------
## Observations                         4,173             4,214              4,426             4,459      
## R2                                   0.491             0.312              0.606             0.293      
## Adjusted R2                          0.490             0.310              0.605             0.292      
## Residual Std. Error            8.680 (df = 4161) 10.500 (df = 4202) 3.110 (df = 4414) 6.220 (df = 4447)
## =======================================================================================================
## Note:                                                                       *p<0.1; **p<0.05; ***p<0.01

09/12/2008 - 09/11/2014

Plot speed data

Base DID model

Using I-84 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-84 as the experimental corridor
## ========================================================================================================
##                                                           Dependent variable:                           
##                                -------------------------------------------------------------------------
##                                                              Travel Speed                               
##                                    AM Inbound         PM Inbound        AM Outbound       PM Outbound   
##                                       (1)                (2)                (3)               (4)       
## --------------------------------------------------------------------------------------------------------
## Time Period (after = 1)            -4.600***          -3.100***          0.931***           -0.279      
##                                     (0.728)            (0.879)            (0.332)           (0.483)     
##                                                                                                         
## Group (experimental group = 1)     -9.640***            -1.770           2.560***          -6.520***    
##                                     (1.020)            (1.160)            (0.420)           (0.612)     
##                                                                                                         
## Time Period × Group                 9.730***          11.400***          -5.090***         -4.210***    
##                                     (1.110)            (1.270)            (0.462)           (0.673)     
##                                                                                                         
## Constant                           45.500***          44.800***          55.500***         47.700***    
##                                     (0.666)            (0.805)            (0.305)           (0.443)     
##                                                                                                         
## --------------------------------------------------------------------------------------------------------
## Observations                         2,872              2,912              2,807             2,823      
## R2                                   0.030              0.116              0.084             0.363      
## Adjusted R2                          0.029              0.115              0.083             0.362      
## Residual Std. Error            10.400 (df = 2868) 12.500 (df = 2908) 4.620 (df = 2803) 6.770 (df = 2819)
## ========================================================================================================
## Note:                                                                        *p<0.1; **p<0.05; ***p<0.01

Using I-205 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-84 as the experimental corridor
## ======================================================================================================
##                                                          Dependent variable:                          
##                                -----------------------------------------------------------------------
##                                                             Travel Speed                              
##                                   AM Inbound        PM Inbound        AM Outbound       PM Outbound   
##                                       (1)               (2)               (3)               (4)       
## ------------------------------------------------------------------------------------------------------
## Time Period (after = 1)            -4.600***         -3.100***         0.931***           -0.279      
##                                     (0.470)           (0.647)           (0.147)           (0.462)     
##                                                                                                       
## Group (experimental group = 1)     10.200***         8.550***          4.110***          7.190***     
##                                     (0.607)           (0.823)           (0.188)           (0.584)     
##                                                                                                       
## Time Period × Group                4.340***           1.730*           1.280***           -0.119      
##                                     (0.668)           (0.906)           (0.205)           (0.640)     
##                                                                                                       
## Constant                           45.500***         44.800***         55.500***         47.700***    
##                                     (0.431)           (0.592)           (0.135)           (0.424)     
##                                                                                                       
## ------------------------------------------------------------------------------------------------------
## Observations                         2,805             2,841             2,895             2,925      
## R2                                   0.523             0.235             0.627             0.232      
## Adjusted R2                          0.522             0.234             0.627             0.231      
## Residual Std. Error            6.700 (df = 2801) 9.190 (df = 2837) 2.050 (df = 2891) 6.470 (df = 2921)
## ======================================================================================================
## Note:                                                                      *p<0.1; **p<0.05; ***p<0.01

Multiple time periods DID models

Using I-84 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-84 as the experimental corridor
## ============================================================================================
##                                               Dependent variable:                           
##                     ------------------------------------------------------------------------
##                                                   Travel Speed                              
##                        AM Inbound         PM Inbound        AM Outbound       PM Outbound   
##                            (1)               (2)                (3)               (4)       
## --------------------------------------------------------------------------------------------
## Group                   -9.640***          -1.770*           2.560***          -6.520***    
##                          (0.951)           (1.050)            (0.288)           (0.586)     
##                                                                                             
## year_1st                 -1.250             -0.580           1.400***           -0.093      
##                          (0.862)           (1.010)            (0.288)           (0.587)     
##                                                                                             
## year_2nd                -5.240***           -0.323           1.190***          2.350***     
##                          (0.861)           (1.020)            (0.288)           (0.596)     
##                                                                                             
## year_3rd                -5.470***         -4.830***          0.794***           -1.110*     
##                          (0.861)           (1.010)            (0.289)           (0.584)     
##                                                                                             
## year_4th                -4.620***         -3.670***          0.887***          -1.680***    
##                          (0.867)           (1.030)            (0.291)           (0.590)     
##                                                                                             
## year_5th                -6.640***         -6.400***            0.311            -0.762      
##                          (0.886)           (1.040)            (0.297)           (0.601)     
##                                                                                             
## Group:year_1st          -4.360***         -6.710***           -0.581            -0.424      
##                          (1.290)           (1.460)            (0.443)           (0.904)     
##                                                                                             
## Group:year_2nd          15.400***         13.700***          -7.250***         -7.830***    
##                          (1.280)           (1.460)            (0.402)           (0.828)     
##                                                                                             
## Group:year_3rd          15.100***         19.400***          -9.220***         -6.310***    
##                          (1.270)           (1.450)            (0.403)           (0.817)     
##                                                                                             
## Group:year_4th          9.510***          12.800***         -10.500***         -4.850***    
##                          (1.310)           (1.500)            (0.418)           (0.851)     
##                                                                                             
## Group:year_5th          12.600***         17.200***          3.960***           -0.217      
##                          (1.290)           (1.470)            (0.413)           (0.833)     
##                                                                                             
## Constant                45.500***         44.800***          55.500***         47.700***    
##                          (0.619)           (0.728)            (0.210)           (0.425)     
##                                                                                             
## --------------------------------------------------------------------------------------------
## Observations              2,872             2,912              2,807             2,823      
## R2                        0.165             0.278              0.570             0.416      
## Adjusted R2               0.162             0.275              0.568             0.414      
## Residual Std. Error 9.630 (df = 2860) 11.300 (df = 2900) 3.170 (df = 2795) 6.480 (df = 2811)
## ============================================================================================
## Note:                                                            *p<0.1; **p<0.05; ***p<0.01

Using I-205 as the experimental corridor

## 
## GL Route Travel Speed 09/12/2004-09/12/2014 & I-84 as the experimental corridor
## ===========================================================================================
##                                               Dependent variable:                          
##                     -----------------------------------------------------------------------
##                                                  Travel Speed                              
##                        AM Inbound        PM Inbound        AM Outbound       PM Outbound   
##                            (1)               (2)               (3)               (4)       
## -------------------------------------------------------------------------------------------
## Group                   10.200***         8.550***          4.110***          7.190***     
##                          (0.589)           (0.807)           (0.171)           (0.573)     
##                                                                                            
## year_1st                -1.250**           -0.580           1.400***           -0.093      
##                          (0.583)           (0.808)           (0.170)           (0.574)     
##                                                                                            
## year_2nd                -5.240***          -0.323           1.190***          2.350***     
##                          (0.582)           (0.811)           (0.169)           (0.583)     
##                                                                                            
## year_3rd                -5.470***         -4.830***         0.794***           -1.110*     
##                          (0.582)           (0.806)           (0.170)           (0.571)     
##                                                                                            
## year_4th                -4.620***         -3.670***         0.887***          -1.680***    
##                          (0.586)           (0.820)           (0.171)           (0.577)     
##                                                                                            
## year_5th                -6.640***         -6.400***          0.311*            -0.762      
##                          (0.599)           (0.831)           (0.175)           (0.587)     
##                                                                                            
## Group:year_1st          2.710***            0.142           -0.799***          -0.009      
##                          (0.823)           (1.130)           (0.238)           (0.801)     
##                                                                                            
## Group:year_2nd          5.390***            0.502            -0.023           -2.880***    
##                          (0.822)           (1.140)           (0.237)           (0.807)     
##                                                                                            
## Group:year_3rd          6.110***          4.070***          3.370***          3.120***     
##                          (0.825)           (1.140)           (0.240)           (0.806)     
##                                                                                            
## Group:year_4th          2.390***            0.208           1.880***            0.876      
##                          (0.842)           (1.150)           (0.242)           (0.817)     
##                                                                                            
## Group:year_5th           2.040*             2.060           2.300***          -2.120**     
##                          (1.040)           (1.370)           (0.247)           (0.830)     
##                                                                                            
## Constant                45.500***         44.800***         55.500***         47.700***    
##                          (0.418)           (0.581)           (0.123)           (0.415)     
##                                                                                            
## -------------------------------------------------------------------------------------------
## Observations              2,805             2,841             2,895             2,925      
## R2                        0.551             0.266             0.692             0.264      
## Adjusted R2               0.549             0.264             0.691             0.261      
## Residual Std. Error 6.510 (df = 2793) 9.010 (df = 2829) 1.860 (df = 2883) 6.340 (df = 2913)
## ===========================================================================================
## Note:                                                           *p<0.1; **p<0.05; ***p<0.01